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PHP passing $_GET in linux command prompt
...php-cgi test1.php foo=123
<html>
You set foo to 123.
</html>
%cat test1.php
<html>You set foo to <?php print $_GET['foo']?>.</html>
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Determine if a function exists in bash
...hich is somewhat inefficient). Would you check if a file is present using cat "$fn" | wc -c? As for zsh, if the bash tag didn't clue you in, maybe the question itself should have. "Determine if a function exists in bash". I would further point out, that while the -F option does not exist in zsh, ...
Difference between Dictionary and Hashtable [duplicate]
...e> is a generic type, allowing:
static typing (and compile-time verification)
use without boxing
If you are .NET 2.0 or above, you should prefer Dictionary<TKey,TValue> (and the other generic collections)
A subtle but important difference is that Hashtable supports multiple reader thre...
How to drop a PostgreSQL database if there are active connections to it?
...ns to database '$1'"
else
echo "killing all connections to database"
fi
cat <<-EOF | psql -U postgres -d postgres
SELECT pg_terminate_backend(pg_stat_activity.pid)
FROM pg_stat_activity
${where}
EOF
Hope that is helpful. Thanks to @JustBob for the sql.
...
How can I see which Git branches are tracking which remote / upstream branch?
...k at the .git/config file which shows the local repository configuration:
cat .git/config
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Ansible: Set variable to file content
...
Note that lookup runs locally, while the cat command in @TesterJeff's example is running on the remote machine.
– Alex Dupuy
Jun 5 '14 at 22:13
8
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How can I exclude one word with grep?
...ed to escape the !):
grep -P '(?!.*unwanted_word)keyword' file
Demo:
$ cat file
foo1
foo2
foo3
foo4
bar
baz
Let us now list all foo except foo3
$ grep -P '(?!.*foo3)foo' file
foo1
foo2
foo4
$
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Executing JavaScript without a browser?
...te files with the #!/usr/bin/js shebang line and things will just work:
$ cat foo.js
#!/usr/bin/js
console.log("Hello, world!");
$ ls -lAF /usr/bin/js /etc/alternatives/js /usr/bin/nodejs
lrwxrwxrwx 1 root root 15 Jul 16 04:26 /etc/alternatives/js -> /usr/bin/nodejs*
lrwxrwxrwx 1 root roo...
How do I import .sql files into SQLite 3?
...
From a sqlite prompt:
sqlite> .read db.sql
Or:
cat db.sql | sqlite3 database.db
Also, your SQL is invalid - you need ; on the end of your statements:
create table server(name varchar(50),ipaddress varchar(15),id init);
create table client(name varchar(50),ipaddress var...
How big can a user agent string get?
...
HTTP specification does not limit length of headers at all.
However web-servers do limit header size they accept, throwing 413 Entity Too Large if it exceeds.
Depending on web-server and their settings these limits vary from 4KB to 64...